Process for the production of pattern effects upon cotton fabrics.



UNITED STATES PATENT OFFICE.

GEORG HEBERLETN, OF WATTWIL, SWITZERLAND.

PROCESS FOR THE PRODUCTION OF PATTERN EFFECTS UPON COTTON FABRICS.

No Drawing.

To all whom it may concern: v

Be it known that I, GEORG HEBERLEIN,

chemist, a citizen of't'he Swiss Republic, and

resident of Wattwil', Canton of St. Gall, Switzerland, have invented anew and useful Process for the Production of Pattern Effects upon CottonFabrics, of which the following is a full, clear, andexactspecification.

The invention relates to modifications of the process for the productionof pattern effects upon cotton fabrics described in my United StatesLetters Patent No'. 1144655 dated 29th June 1915.

I have found that the transparent effects produced upon mercerizedcotton fabrics by the short local action of sulfuric acid of over 50?Baum is enhanced if the fabric be submitted to subsequent mercerization-by soda lye.

The process as improved consists therefore firstly in submitting thefabric to mercerization by means of soda lye; secondly in printing thefabric thereafter with sulfuric acid of over 50% Baum and washing outafter a few seconds, or, printing upon the fabric in a resist andpassing it through concentrated sulfuric acid of over 50 Baum for a fewseconds, and thereafter washing it out, and finally in submitting thelfabric to a further mercerization with soda ye. I

Transparent effects similar to those described in the United StatesLetters Patent No. 1144655 may also be securedby printing the fabricwith sulfuric acid of over' 505; B. and then washing, and subsequentlySpecification of Letters Patent.

Application filed February 17, 1916. :Serial No. 79,005. v

I Submitting the fabric to mercerization with soda lye.

What I claim is:

1. ,The described process for obtaining 'pattern effects upon cottonfabrics consisting of taking mercerized fabrics, subjecting the partswhere pattern effects are to be produced for a few seconds to the actionof sulfuric acid of overv 50% B., washing out the acid and finallysubjecting the fabrics to a further mercerization with soda lye.

2. The described process for obtaining pattern effects upon cottonfabrics consisting of taking mercerized fabrics, printing the requiredpattern on the said'me'rcerized cotton fabrics with sulfuric acid ofover '50? B., washing out the acid after a few seconds andfinally-subjecting the fabrics to a further mercerization with soda lye.

3. The described process for obtaining pattern effects upon cottonfabrics consisting of subjecting the parts of the fabrics where patterneffects are to be produced for a few seconds to the action of sulfuricacid of over 50% B., washing out the acid and finally subjecting thefabrics to a mercerization with soda lye.

p 4. The described process for obtaining pattern effects upon cottonfabrics consisting of printing the required pattern on the fabrics withsulfuric acid of over 50% B., washing out the acid after a few secondsand finally subjecting the fabrics to a mercerization with soda lye. Inwitness whereof I have hereunto signed my name this 4th day of January,1916, in the presence of two subscribing witnesses. DR. GEORG HEBERLEIN.Witnesses: A. BAUMRA'rz,

E. GATTB.

